AYSZ bin

[Phil Rickard]

What you are seeing there Jeremy, is the rpm rev limiter that is active when the vehicle is in park
or nuetral. That is a feature inherent to this engine family/design.
(max limit 3600 rpm)

Regards....

Phil Rickard-
Engine builder/tuner for Pirate Racing's 1999 Corvette C5-R
Formerly with L.P.E.


----- Original Message -----
From: Jeremy Gonyou <jgonyou at hotmail.com>
To: <gmecm at diy-efi.org>
Sent: Thursday, November 30, 2000 3:00 PM
Subject: AYSZ bin


>
> First, would anyone like a copy?
>
> This is a junkyard find from a Lumina Z-34, 3.4 V6 DOHC.  Looked to be of
> 93-94 vintage, but hard to say.
>
> Looking at the code I've found something of deep concern:  Whereas most code
> has an rpm variable that goes up to 4800, AYSZ has a similar variable, but
> it only goes to 3600 rpm.  This is the variable that is used to lookup up
> the main spark advance and VE2 (VE2 normally goes to 6400 rpm)
> Sooo... it appears to me that GM is treating the engine the same whether it
> is revving at 3600 or *twice* that.
>
> I've heard rumors that they backed the engine off to save transmission life,
> but I've always dimissed them as wishful thinking ...
>
> Any insights ?
>
> Thanks
>
> Jeremy
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